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单词 uranium
释义 uranium
 /yoo ray"nee euhm/, n. Chem.
 a white, lustrous, radioactive, metallic element, occurring in pitchblende, and having compounds that are used in photography and in coloring glass. The 235 isotope is used in atomic and hydrogen bombs and as a fuel in nuclear reactors. Symbol: U; at. wt.: 238.03; at. no.: 92; sp. gr.: 19.07.
 [1790-1800; < NL; see URANUS, -IUM]
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